Niles VCS50K Indoor Stereo Volume Control, 50 Watts Universal Impedance Magnifying circuit enables safe connection of up to eight pairs of loudspeakers to a single amplifier or receiver using the VCSHU B8 Make-before-break switch design delivers 11-step, pop-free control for a wide range of listening volumes Ensures sound quality at 50W continuous power handling with flat frequency response (+/- 1.2dB) Includes designer-approved screwless wall plates in four colors to blend seamlessly into any decor and accommodates standard one-gang electrical boxes Ten-year limited parts-and-labor warranty